Went from a "D" to a "B"

I first installed WP Performance Score Booster and my GTMetrix grade went from a D to a B and improved a lot. Wanting a better score, I removed WP Performance and installed Speed Booster but my score dropped to a B to an E – obviously well below what I first had. So, I deleted Speed Booster, and re-installed WP Performance, and my score went back to 86% and a B. My “Defer Parsing of Javascript” and “CSS Sprites” are still an F so I need to try and find a plugin that will focus of those issues. This plugin is recommended for an overall improvement, but now I need to dive in to see of there’s a plugin that will improve this “parsing” and “CSS Sprites” thing. Download and donate – it does work!